AIR4100-R Room Air Quality VOC Sensor + Relay output

Description

The AIR4, Air Quality Sensor uses an advanced MEMS metal oxide semiconductor sensor to detect poor air quality. The sensor reacts quickly to detect a broad range of VOCs such as smoke, cooking odors, bio-effluence, outdoor pollutants and from human activities. The sensor captures all VOC emissions that are completely invisible to CO2 sensors. Extensive studies and research have shown that there is direct correlation between CO2 levels and VOC levels and the Air Quality Sensor has been calibrated to provide a “CO2-equivalent” ppm measurement value, thereby achieving full compatibility to existing HVAC CO2 ventilation standards.

The CO2-equivalent sensor output value was developed over a period of several years to allow the IAQ sensor to be optimized for Demand Controlled Ventilation applications. The long-term IAQ sensor performance was monitored in various locations including offices, cafeterias, schools, production facilities, apartments and homes in direct comparison to infrared-absorption CO2 sensors.

Features

• Direct correlation to CO2 levels
• High sensitivity and fast response
• Stable long-term operation
• 0 to 2000 ppm CO2 equivalent output signal
• LCD to display air quality information
• Internal menu for easy setup
• Analog stepped output for damper control
• Linear output for logging and control
• Selectable 0-5 or 0-10 Vdc signal
• Tri-color LED to indicate IAQ level 
• Optional relay output with adjustable setpoint
• Optional override switch output 
• Optional resistive temperature sensors

Specifications

• Sensing Technology:MEMS metal oxide semiconductor VOC sensor
• Measurement Range: 450-2000 ppm CO2 equivalent or 0-100% (menu selectable)
• Drift Compensation: Automatic baseline correction
• Power Supply: 20-28 Vac/dc (non-isolated half-wave rectified)
• Consumption: 35 mA max @ 24 Vdc
• Input Voltage Effect: Negligible over specified operating range
• Protection Circuitry: Reverse voltage protected, over voltage protected
• Operating Conditions: 0-50 °C (32-122 °F), 5-95 %RH non-condensing
• Linear Output Signal: 0-5 / 0-10 Vdc (menu selectable) = 0-2000 ppm CO2 equivalent
• Analog Stepped Output Signal: Three steps representing Good, Fair and Poor air quality (each step is independently adjustable from 0-10 Vdc)
• Output Drive Capability: 10 KΩ minimum
• Programming and Selection: Via internal push-buttons and LCD menu
• Warm-up Time: 5 minutes
• LCD Resolution: 1 ppm / 1 %
• LCD Size: 1.4” w x 0.6” h (35 x 15 mm) alpha-numeric 2 line x 8 characters 
• LCD Backlight: Enable or disable via menu
• LED Display (Room Only): Tri-color (Good = Green, Fair = Blue, Poor = Red), enable or disable via menu
• Wiring Connections: Screw terminal blocks (14 to 22 AWG)
• Enclosure:
  Room: White ABS, IP30 (NEMA 1)
  Duct: Grey ABS, UL94-5VB, IP65 (NEMA 4X)
• Dimensions:
  Room: 84 w x 119 h x 29 d mm (3.3”w x 4.7”h x 1.15”d)
  Duct: 145 w x 100 h x 63 d mm (5.7”w x 3.95”h x 2.5”d)
  Duct Probe: 177 long x 25.4 Diameter mm (7”l x 1” d)
• Weight:
  Room: 122 gm (4.3 oz)
  Duct: 290 gm (10.2 oz)
• Override Switch (Room only): Front panel switch with FET output, 30 Vdc @ 50 mA max
• Relay Output: Optional on Room, Standard on Duct
  Form A contact (N.O.) 2 Amps @ 140 Vac, 2 Amps @ 30 Vdc (trip point and hysteresis set via menu)
• Optional Temperature Sensor: Various thermistors and RTDs, 2-wire resistive output

Technical

AIR4100 series datasheet

Applications

Air quality monitoring in:

Schools, Offices, Garages / Parking area's, Factories, cigarette smoke detection, washroom's etc.